[펌] [spark] spark graceful하게 종료하는 방법

spark app을 graceful하게 종료하는 방법이 정리된 링크이다.

https://www.linkedin.com/pulse/how-shutdown-spark-streaming-job-gracefully-lan-jiang/

https://github.com/lanjiang/streamingstopgraceful/blob/master/src/main/scala/com/cloudera/ps/GracefulShutdownExample.scala